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landslides

The current situation on the Birch Glacier at Blatten, showing the heavy fracturing in the ice of the Birch Glacier.
Posted inThe Landslide Blog

The 28 May 2025 catastrophic failure of the Birch Glacier and the partial burial of Blatten

by Dave Petley 29 May 202529 May 2025

The Landslide Blog is written by Dave Petley, who is widely recognized as a world leader in the study and management of landslides. Over the course of the last few days, I have been blogging about the evolving situation on the slopes above Blatten in Switzerland. I documented that attention slowly transitioned from worries about […]

The current situation on the Birch Glacier at Blatten.
Posted inThe Landslide Blog

The 28 May 2025 update on the landslide threatening Blatten in Switzerland

by Dave Petley 28 May 202528 May 2025

The Landslide Blog is written by Dave Petley, who is widely recognized as a world leader in the study and management of landslides. Over the last 24 hours there have been further developments in the situation on the slopes above Blatten in Switzerland, with attention continuing to focus primarily on the Birch Glacier. Yesterday evening […]

Webcam image from 27 May 2025 showing the deforming slope at Blatten in Switzerland.
Posted inThe Landslide Blog

The 26/27 May 2025 update on the landslide threatening Blatten in Switzerland

by Dave Petley 27 May 202527 May 2025

Smaller rockfalls have reduced the risk of a major rock slope collapse above Blatten, but attention has shifted to the Birch Glacier, which is now moving at 10 metres per day. The Landslide Blog is written by Dave Petley, who is widely recognised as a world leader in the study and management of landslides. Over […]

A drone image of the site of the 21 May 2025 quick clay landslide at Sainte Monique in Canada. Still from a drobe video posted to Youtube by Radio-Canada Info.
Posted inThe Landslide Blog

The 21 May 2025 quick clay landslide at Sainte Monique in Quebec, Canada

by Dave Petley 22 May 202522 May 2025

The Landslide Blog is written by Dave Petley, who is widely recognized as a world leader in the study and management of landslides. On 21 May 2025, a family lost their home to a quick clay landslide in Sainte Monique, to the northeast of Montreal in Quebec, Canada. Radio-Canada Info has posted to Youtube some […]

The upper part of the landslide on Kleiner Nesthorn above Blatten in Switzerland.
Posted inThe Landslide Blog

The 21 May 2025 update on the landslide threatening Blatten in Switzerland

by Dave Petley 21 May 202521 May 2025

The Landslide Blog is written by Dave Petley, who is widely recognised as a world leader in the study and management of landslides. News this morning from Blatten in Switzerland is that the landslide on Kleiner Nesthorn has continued to develop. Blue News reports that: “The situation in Blatten in the Valais Lötschental remained tense […]

Webcam image of the deforming slope at Blatten in Switzerland.
Posted inThe Landslide Blog

The incipient major rock slope failure at Blatten in Switzerland

by Dave Petley 20 May 202520 May 2025

The Landslide Blog is written by Dave Petley, who is widely recognized as a world leader in the study and management of landslides. In Switzerland, a dramatic rock slope failure is developing above Blatten [46.4128, 7.7987], a village located in Vallais Canton. Blue News is providing regular updates on a dedicated website. The drama started […]

Google Earth map of the area studied by Zhang et al. (2025) to examine the role of geological complexity in landslide distribution.
Posted inThe Landslide Blog

Geological complexity as a way to understand the distribution of landslides

by Dave Petley 15 May 202515 May 2025

The Landslide Blog is written by Dave Petley, who is widely recognized as a world leader in the study and management of landslides. Over the course of my career, I have read many papers (and indeed, written a few) that have tried to explain the distribution of landslides based upon combinations of factors that we […]

Posted inThe Landslide Blog

Images of the source of the 28 April 2025 landslide / GLOF at Vallunaraju in Peru

by Dave Petley 8 May 20258 May 2025

The Landslide Blog is written by Dave Petley, who is widely recognized as a world leader in the study and management of landslides. A few days ago I highlighted the severe landslide and GLOF that occurred on the flanks of Vallunaraju in Peru, on 28 April 2025, which caused substantial damage and at least two […]

Temporal distribution of rockfall events and fatalities in Spain within the last 220 years.
Posted inThe Landslide Blog

Patterns of fatal non-seismic rockfalls in Spain

by Dave Petley 6 May 20256 May 2025

The Landslide Blog is written by Dave Petley, who is widely recognized as a world leader in the study and management of landslides. A fascinating new paper (Corominas et al. 2025) has just been published in the journal Geoenvironmental Disasters that describes the compilation and analysis of a new dataset on fatal non-seismic rockfalls in […]

Planet Labs image of the downstream impacts of the 28 April 2025 Glacial Outburst Flood (GLOF) / landslide at Vallunaraju in Peru.
Posted inThe Landslide Blog

The 28 April 2025 Glacial Outburst Flood (GLOF) / landslide at Vallunaraju in Peru

by Dave Petley 2 May 20252 May 2025

The Landslide Blog is written by Dave Petley, who is widely recognized as a world leader in the study and management of landslides. On 28 April 2025, a major debris flow travelled down a channel from a major mountain, Vallunaraju, striking the communities lower down the slope. At least 100 houses were destroyed and two […]

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